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Title: Geant4 x-ray fluorescence with updated libraries
Authors: Bakr, S
Cohen, DD
Siegele, R
Archer, JW
Incerti, S
Ivanchenko, V
Mantero, A
Rosenfeld, AB
Guatelli, S
Keywords: PIXE analysis
Cross sections
X-ray fluoresence analyiss
Hartree-Fock method
Heavy ion beam probe
Issue Date: 15-Nov-2021
Publisher: Elsevier B. V.
Citation: Bakr, S., Cohen, D. D., Siegele, R., Archer, J. W., Incerti, S., Ivanchenko, V., Mantero, A., Rosenfeld, A., & Guatelli, S. (2021). Geant4 x-ray fluorescence with updated libraries. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 507, 11-19. doi:10.1016/j.nimb.2021.09.009
Abstract: We present the results concerning the development in Geant4 of a new data driven library, called here the ANSTO HF library. This X-ray fluorescence library is based on an approach of particular interest for PIXE simulation applications; however, it can be used in any Geant4 applications where X-ray fluorescence needs to be described. The X-ray fluorescence transition probabilities were calculated within the Hartree-Fock (HF) approach, which is recognised to better reproduce PIXE experimental values compared with the Hartree-Slater approach, adopted in the current default Geant4 EADL data library. These HF X-ray fluorescence transition probabilities were integrated into a new Geant4 library and will be released within Geant4 in the near future. In this paper, we compare the fluorescence X-ray spectra generated by the ANSTO HF library and by the currently available library (EADL-1991 [1]) within Geant4, for targets irradiated with protons and α particles with energies up to 10 MeV, a range of interest for PIXE applications. The comparisons were performed for a large set of sample materials spanning a broad range of target atomic numbers. These two approaches were compared to existing experimental measurements performed at the ANSTO heavy ion microprobe beamline using 2 MeV and 3 MeV proton and 10 MeV He2+ ion beams. This work represents a useful upgrade to the Geant4 atomic de-excitation package. © 2021 Elsevier B.V.
ISSN: 0168-583X
Appears in Collections:Journal Articles

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